Hello Andris and Dani,
The downloadable spreadsheet has been a part of the post from the beginning. Click on the language in the post above that says, "the spreadsheet of the rescaled range analysis of daily return data for the S&P 500 Index from 3 January 1950 through 15 November 2012." Once you open the spreadsheet you should be able to see all of the data - many thousands of daily returns for the S&P 500 - plus all of the calculations. I just downloaded it myself to confirm this is possible.
If that doesn't work, please let me know and I will see about giving a more in-depth answer.
Thanks for reading!
Jason